Neuropathology is the study of diseases of the brain, spinal cord, and nerves. Neuropathologists diagnose and study nervous system samples collected during surgery and post-mortem evaluation. Like other organs, the brain and spinal cord can also develop tumors, which are affected by the infection process such as viruses and bacteria, and can develop into a variety of diseases, including diseases specific to the nervous system, such as Alzheimer's disease and Huntington's disease. The analysis of neurons and brain tissue is essential for us to understand how neurological diseases behave and which tissues, cells and areas are affected.